your user name seems befitting. singletrack... as in you can only think of it a single way: yours. anytime there is a dealership involved and a customer... you have two perspectives. which is right and which is wrong is a moot point. give and take a little here and there. they have likely given you a little bit of a handout over the years where you didnt even realize it.

if you're going to write back again, you may as well consider both their perspective and yours as both are 50% of the argument.

I'm sorry you don't like it when people disagree with you. I've yet to hear an explanation of how an oil filter can loosen without being hit by something. Their explanation isn't plausible.